#!/usr/bin/env python3
#
# Copyright (C) 2022 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# This is a Python hook script which is invoked whenever a SSTP client session
# goes "ip-up". It will call into our vyos.ifconfig library and will then
# execute common tasks for the SSTP interface. The reason we have to "hook" this
# is that we can not create a sstpcX interface in advance in linux and then
# connect pppd to this already existing interface.

from sys import argv
from sys import exit

from vyos.configquery import ConfigTreeQuery
from vyos.configdict import get_interface_dict
from vyos.ifconfig import SSTPCIf

# When the ppp link comes up, this script is called with the following
# parameters
#       $1      the interface name used by pppd (e.g. ppp3)
#       $2      the tty device name
#       $3      the tty device speed
#       $4      the local IP address for the interface
#       $5      the remote IP address
#       $6      the parameter specified by the 'ipparam' option to pppd

if (len(argv) < 7):
    exit(1)

interface = argv[6]

conf = ConfigTreeQuery()
_, sstpc = get_interface_dict(conf.config, ['interfaces', 'sstpc'], interface)

# Update the config
p = SSTPCIf(interface)
p.update(sstpc)
